#define _CRT_SECURE_NO_WARNINGS 1
#include<iostream>
#include<vector>
using namespace std;
class Solution {
public:
    int minPathSum(vector<vector<int>>& grid) {
        int m = grid.size(), n = grid[0].size();
        vector<vector<int>> as(m + 1, vector<int>(n + 1, INT_MAX));
        as[0][1] = 0;
        as[1][0] = 0;
        for (int i = 1; i <= m; i++)
        {
            for (int j = 1; j <= n; j++)
            {
                as[i][j] = min(as[i - 1][j], as[i][j - 1]) + grid[i - 1][j - 1];
            }
        }
        return as[m][n];
    }
};